EP1223296B1 - Frain pour une jalousie sans corde - Google Patents

Frain pour une jalousie sans corde Download PDF

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Publication number
EP1223296B1
EP1223296B1 EP02000180A EP02000180A EP1223296B1 EP 1223296 B1 EP1223296 B1 EP 1223296B1 EP 02000180 A EP02000180 A EP 02000180A EP 02000180 A EP02000180 A EP 02000180A EP 1223296 B1 EP1223296 B1 EP 1223296B1
Authority
EP
European Patent Office
Prior art keywords
bottom rail
rail
head rail
brake
cord
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02000180A
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German (de)
English (en)
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EP1223296A1 (fr
Inventor
Roger C. Palmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Levolor Inc
Original Assignee
Newell Window Furnishing Inc
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Filing date
Publication date
Application filed by Newell Window Furnishing Inc filed Critical Newell Window Furnishing Inc
Publication of EP1223296A1 publication Critical patent/EP1223296A1/fr
Application granted granted Critical
Publication of EP1223296B1 publication Critical patent/EP1223296B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32—Operating, guiding, or securing devices therefor
    • E06B9/322—Details of operating devices, e.g. pulleys, brakes, spring drums, drives
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/80—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling
    • E06B9/82—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic
    • E06B9/90—Safety measures against dropping or unauthorised opening; Braking or immobilising devices; Devices for limiting unrolling automatic for immobilising the closure member in various chosen positions

Definitions

  • the present invention relates generally to a cordless blind, and more particularly to a cordless blind having a one way brake.
  • the slats are raised and lowered by a pair of lift cords.
  • the lift cords are typically secured to a bottom rail and extend upward through the slats into a head rail.
  • the lift cords are guided within the head rail and exit through a cord lock.
  • the lift cords hang outside of the window covering, may present a safety concern to small children and pets.
  • the lift cords In order to raise or lower the window covering the lift cords must be manipulated to first release the cord lock. Similarly, once the window covering has been raised or lowered the cord lock must be manipulated again to lock the cords in place.
  • Cordless blinds and shades in which the lift cords are contained within the bottom rail, window covering and head rail are referred to as cordless blinds and shades, since no portion of the lift cords are external to the blind or shade.
  • Cordless blinds have been gaining popularity and are employed in a wide variety of blinds and shades such as venetian blinds, cellular blinds, pleated shades, and wood blinds.
  • One type of cordless blind disclosed in U.S. Patent Nos. 5,482,100 ; 5,531,257 ; and 6,079,471 utilizes a spring motor to apply a spring force to the lift cords to bias the bottom rail and accumulated window covering toward the top rail.
  • the spring force of the spring motor, system frictional forces and the combined weight of the bottom rail and accumulated window covering are selected to balance the bottom rail relative to the top rail.
  • the frictional force is greater than the difference between the spring force and the combined weight of the bottom rail and accumulated window covering when the bottom rail is at any location between a fully extended position and a fully retracted position.
  • the bottom bar will either move upward or downward depending on the imbalance in the system. For example if the spring force is greater than the weight of the bottom bar and accumulated window covering and the frictional forces in the system, then the bottom bar will continue to be biased upward toward the head rail, until the weight of the accumulated window covering balances the system. Similarly, if the spring force and frictional system forces are less than the weight of the bottom bar and accumulated window covering the bottom bar will move downward away from the head rail.
  • the weight of the accumulated window covering increases as the bottom bar moves toward the head rail, it is possible that the spring force causes the bottom bar to move toward the head rail when the bottom rail is fully extended, but when the bottom rail is close to the head rail, the weight of the bottom rail and accumulated window covering causes the bottom bar to move away from the head rail.
  • U.S. Patent No. 6,024,154 discloses a brake is applied to the spring motor to prohibit the bottom member from moving toward or away from the head rail without the brake being released.
  • U.S. Patent No. 6,029,734 discloses a bind having a spring motor in which a brake is applied directly to the lift cords within the bottom rail to prohibit the bottom member from moving toward or away from the head rail.
  • This brake system allows the use of a cordless blind without the need to ensure that all of the forces are in balance. Since, neither of the blinds are balanced, the brake mechanisms disclosed in the '154 and '734 patents prevent the lift cords from either unwinding or retracting thereby preventing the bottom rail from moving either toward or away from the head rail until the brake is released.
  • the blind is raised to the full open position such that bottom rail is close to the top rail, it may be difficult for a user to disengage the lock at that height.
  • cordless blind having a brake mechanism that would permit the blind to be lowered without requiring the brake to be released. It would also be advantageous to provide a cordless blind having a brake mechanism in which the bind could be raised by manual biasing of the bottom rail toward the top rail without releasing the brake.
  • a window blind comprises a head rail, a bottom rail and a window covering extending between and operatively connected to the head rail and bottom rail. At least one lift cord extends between the bottom rail and the head rail. A spring motor operatively coupled to the lift cord biases the bottom rail toward the head rail. A one way brake prohibits the bottom rail from moving toward the head rail but permits the bottom rail to be moved away from the head rail by an operator.
  • a window blind comprises a head rail, a bottom rail, and a window covering extending between and operatively connected to the head rail and bottom rail.
  • At least one lift cord extends between the bottom rail and the head rail.
  • a spring motor is operatively coupled to the lift cord to apply an upward force on bottom rail toward the head rail.
  • a one way brake in an engaged position prohibits the spring motor from moving the bottom rail in a first direction relative to the head rail and permits the bottom rail to be moved in a direction opposite to the first direction relative to the head rail.
  • a switch is located in the bottom rail and is operatively connected to the one way brake to disengage the one way brake to permit movement of the bottom rail in the first direction.
  • a window blind comprises a head rail and a bottom rail.
  • a window covering extends between and is operatively connected to the head rail and bottom rail,
  • At least one lift cord extends between the bottom rail and the head rail.
  • a spring motor is operatively coupled to the lift cord to apply an upward force to the bottom rail toward the head rail.
  • a one way brake prohibits the bottom rail from moving away from the head rail but permits the bottom rail to be moved toward the head rail by an operator.
  • a cordless blind 10 includes a bottom rail 12, a head rail 14 and a window covering 16 extending therebetween.
  • a pair of lift cords 18, 19 extend between and operatively connect the bottom rail 12 and the head rail 14.
  • a spring motor 20 rotates a pair of cord spools 22, 23 to wind the lift cords 18, 19 thereby biasing the bottom rail 12 toward the head rail 14. In this way the window covering material is moved from a fully extended position in which the window is substantially covered to a fully raised position in which the window is substantially uncovered.
  • the window covering illustrated in FIG. 1 is a venetian blind having a plurality of slats supported by a pair of ladder cords.
  • the window covering could be any type of blind or shade.
  • the window covering may also include a cellular shade, a roller shade, a Roman shade, a light control shade, pleated shade or any other blind or shade material known in the art.
  • spring motor 20 includes a spring 24 having a predetermined spring force.
  • Spring 24 is coupled to a storage drum 28 for transfer to an output drum 30.
  • the cord spools 22, 23 are operatively coupled to the storage drum 28 and output drum 30 with gears 32.
  • Spring motor 20 through spring 24 acts to rotationally bias the cord spools 22, 23 to wind each lift cord 18, 19 about cord spools 22, 23 respectively.
  • cord spool 22 is biased to rotate counter-clockwise
  • cord spool 23 is biased to rotate clockwise.
  • the clockwise and counter-clockwise directions are illustrated with arrows in FIG. 4. Note that FIG 4 is a view of the spring motor 20 from the bottom and the clockwise and counter-clockwise directions will be determined from this view.
  • Spring motor 20 could also be configured to bias cord spools 22, 23 to rotate clockwise and counter-clockwise respectively.
  • the rotational direction of the cord spools aid in the explanation of the operation of the system. It is possible to alter the rotational direction of one or both of the cord spools 22, 23 by adding another gear between the cord spools and one or both of the storage and output drums 28, 30. It is also possible to change the way in which lift cords 18, and 19 are wound about cord spools 22, 23. In any event, the lift cords 18, 19 are attached to cord spools 22, 23 such that when the spring motor 20, biases the cord spools 22, 23, lift cords 18, 19 are wound about the respective cord spools 22, 23.
  • a brake mechanism 34 operatively engages the cord spool 22 to selectively prohibit the cord spool 22 from rotating counter-clockwise thereby prohibiting lift cords 18, 19 from being wound about cord spools 22, 23. As a result the brake mechanism 34 prohibits the bottom bar from moving toward the head rail.
  • Brake mechanism 34 includes a ratchet wheel 36 operatively engaged with the spring motor 20 with an auxiliary gear 38. Since, cord spool 22, cord spool 23, storage drum and output drums 28, 30 are operatively connected to one another with gears 32, a braking force applied to any member will have the effect of prohibiting rotation of the cord spools 22, 23.
  • Brake Mechanism 34 further includes a pawl 40 secured to a lever 42.
  • a button 44 is attached to lever 42 and extends through an aperture 46 in bottom rail 12.
  • button 44, lever 42 and pawl 40 make up a single activation unit 48.
  • a brake spring 50 biases the activation unit 48 such that pawl 40 is engaged with ratchet wheel 36.
  • Brake spring 50 is located between a first cross bar or barb 52 on lever 42 and a ledge 54 fixed relative to bottom rail 12. As illustrated in FIG. 3 brake spring 50 biases the activation unit 48, such that button 44, and lever 42 extend outwardly thereby engaging pawl 40 with ratchet wheel 36.
  • pawl 40 does not permit ratchet wheel 36 to rotate in a clockwise direction, thereby preventing cord spool 22 from rotating counter-clockwise and winding lift cords 18, 19 about cord spools 22, 23 as discussed above.
  • lift cords 18, 19 will not be wound about cord spools 22, 23 and consequently bottom rail 12 will not be raised toward head rail 14 until button 44 is pushed against the brake spring 50 releasing the pawl 40 from the ratchet wheel 36.
  • a recess 56 is formed in a front side 58 of bottom rail 12 to accommodate button 44 as it is depressed to disengage pawl 40.
  • button 44 is flush with front side 58 of bottom rail 12, when the activation unit 48 is in the engaged position.
  • the lift cords 18, 19 will not be wound about cord spools 22, 23, however, it is possible to unwind the lift cords 18, 19 from cord spools 22, 23 by simply pulling down on the bottom rail.
  • the pawl 40 prevents the cord spool 22 from winding cord 18 but it does not prevent the cord spool 23 from rotating clockwise, thereby allowing the lift cords 18, 19 to unwind about.
  • the activation unit 48 is in a disengaged position when button 44 is depressed thereby extending pawl 40 away from ratchet wheel 36.
  • cord spool 22 is free to rotate counter-clockwise and as a result lift cords 18, 19 are wound about cord spools 22, 23 respectively. This then permits the spring motor 20 to bias the bottom rail 12 toward the head rail 14.
  • FIGS. 5-7 another embodiment of a one-way brake mechanism 60 includes an internal ratchet 62 that is integral with a cord spool 64 of a spring motor 66. Since the components of the cordless blind 10 for the embodiment illustrated in FIGS. 1-4 are the same for the embodiment illustrated in FIGS 5-7, the same reference numerals will be used to identify the similar components. Where the components are different a different reference numeral will be used to designate different components. For example the head rail, window covering and lift cords are the same for each of the embodiments, however, the spring motor, and cord spools used for different embodiments will be designated with different reference numerals.
  • Brake mechanism 60 includes an activation unit 68 having a lever 70 provided with free end 72 in the form of a flat plate.
  • a pawl 74 extends upward from a second end of lever 70.
  • a brake spring 76 biases pawl 74 into engagement with internal ratchet 62.
  • lever 70 pivots about a fulcrum 78, such that an upward movement of the free end 72 of lever 70 results in a downward movement of pawl 74 from internal ratchet 62, thereby disengaging the pawl 74 from the internal ratchet 62.
  • the cord spool is permitted to rotate in a single direction.
  • cord spool 64 is permitted to rotate clockwise but not counter-clockwise when the pawl 74 is engaged, thereby prohibiting lift cord 18 from being wound about cord spool 64, but permitting lift cord 18 to be unwound from cord spool 64.
  • lever 70 when the free end 72 of lever 70 is moved upward, pawl 74 is disengaged from internal ratchet 62 thereby permitting the lift cords to be wound about the cord spools resulting in the lifting of the bottom rail toward the head rail.
  • the upward movement of the lever 70 provides an intuitive motion of a user to move the bottom rail in the upward direction, since the force of the user against the button is the same direction as the bottom rail toward the head rail. Since the user would be pressing the lever 70 in the upward direction, the force of the operator against the lever 70 and bottom rail would assist the movement of the bottom rail in the upward direction.
  • FIGS. 8 and 9 Another one-way brake mechanism 80 employing an internal ratchet 82 attached to or integral with a cord spool 83 is illustrated in FIGS. 8 and 9.
  • an activation unit 84 includes a button 86 attached to a lever 88 extending upward from the bottom or underside 89 of the bottom rail.
  • a pawl 90 extends from the end of lever 88 and interacts with internal ratchet 82.
  • a brake spring 92 biases the activation unit 84 downward thereby biasing the pawl 90 into engagement with the internal ratchet 82. In this engaged position, the spring motor is stopped from winding the lift cords about the cord spool 83.
  • the ratchet/pawl arrangement allows the rotation of the cord spool 83 in a single direction, it is possible to lower the bottom rail by simply pulling the bottom rail downward.
  • the one-way brake 80 permits the cord spool to rotate in a direction such that the lift cord is unwound therefrom. This permits the bottom rail to extend in away from the head rail. However, upon release of the bottom rail by the user, the cord spool is stopped from winding the lift cord by the ratchet/pawl mechanism.
  • the brake 80 is disengaged by pressing the button 86 upward into the bottom rail thereby releasing the pawl 90 from the ratchet 82. Once the pawl 90 has been disengaged, the cord spool 83 is free to rotate and wind the lift cord thereby biasing the bottom rail 12 toward the head rail 14. As in the last embodiment, the depression of the button 86 upward would also intuitively correspond with an operator's expectation that the bottom rail 12 should move upwards.
  • the internal ratchets 62, 82 of the brake mechanisms 60 and 80 are attached to cord spools 64, 83 respectively, the internal ratchets 62, 82 could also be integral with one of the storage or output drums of the spring motor.
  • FIGS. 1-9 apply the one-way positive braking mechanism to the spring motor and cord spools 22 either directly or through an auxiliary gear. Without releasing the pawl from the ratchet wheel it is not possible to wind the lift cords about the cord spools.
  • movement of the bottom rail in a downward direction away from the head rail simply requires the operator to exert a downward force sufficient to over come any system frictional forces (Ffd) resisting downward movement and the difference between the Spring motor force (SMf) and the weight of the bottom rail (Rw) and the weight of the accumulated window covering (WCw).
  • the force required by the operator (Of) to move the bottom rail downward can be expressed as Of > (SMf + Ffd) - (Rw + WCw).
  • a frictional force is applied to at least one of the lift cords 18 with a roller mechanism 90.
  • Roller mechanism 90 includes a first stationary roller 92 and a second movable roller 94.
  • the movable roller 94 is spring biased against the stationary roller 96 with a roller spring 98.
  • Lift cord 18 passes between the first and second rollers 92, 94.
  • the frictional force acting upon the lift cords 18 is greater than the spring force of the spring motor biasing the lift cord onto the cord spools. As a result, the bottom rail will not move toward head rail until the frictional force of the roller mechanism 90 is reduced.
  • a release mechanism 99 includes a button 100 and a lever 102 attached to the movable roller 94.
  • button 100 When an operator depresses button 100, the force of roller spring 98 is overcome and the movable roller 94 moves away from the stationary roller 92 thereby releasing the frictional force on the lift cord.
  • the lift cord is free to move relative to the first and second rollers thereby permitting the lift cords to be wound about the cord spools.
  • a frictional one-way brake 104 may be applied to one of the components on the spring motor or to an auxiliary gear 106.
  • a release mechanism 108 would be similar to the embodiments discussed above, with an external button 110 and lever 112 to move a spring biased element or roller 114 away from the spring motor.
  • the friction is not applied to the lift cords, but rather directly to the spring motor itself.
  • the benefit of the frictional brakes is the reduction in complexity and the elimination of the pawl and ratchet member which will not operate properly if the pawl member is damaged or one of the ratchet teeth on the ratchet wheel is damaged. Additionally, the use of a ratchet provides for a discrete number of positions based upon the number of teeth on the ratchet wheel. In contrast, the frictional device provides for a continuous positioning of the bottom rail, thereby allowing for more precise location of the bottom rail.
  • All of the embodiments described above utilize the one-way brake mechanisms to prohibit the spring motor from moving the bottom rail toward the head rail without first disengaging the brake. However, all of the embodiments do permit a user to pull the bottom rail downward away from the head rail without releasing the brake. This concept may be referred to as the upward one-way brake, in that the bottom rail 12 may not move upward until the brake is released.
  • the embodiments that utilize a ratchet/pawl arrangement permit the bottom rail to move downward, therefore the combined weight of the bottom rail (Rw) and the accumulated window covering (WCw) must be less than the forces resisting downward movement including the system friction (Ffd) resisting downward movement and the spring force of the spring motor (SMf). This ensures that the bottom rail does not move downward without additional force.
  • the upward one-way brake embodiments that utilize a friction device either applied to the cord or to one of the members of the spring motor, operate by ensuring that the frictional force applied to the system by the one-way brake (Bf) is greater than the spring force of the spring motor (SMf) minus the combined weight of the bottom rail (Rw) and the weight of accumulated window covering (WCw) and the system friction (Ffu) opposing upward motion of the bottom rail.
  • This relationship is required in addition to that stated above for the upward one-way brake utilizing the ratchet that SMf > Ffu + (Rw + WCw).
  • the one-way brake mechanisms may be modified such that the brake mechanisms prohibit the bottom rail from moving downward away from the head rail unless the brake is disengaged, but allow a user to move the bottom rail toward the head rail by simply pushing the bottom rail in an upward direction.
  • This embodiment will be referred to as the downward brake, in that the bottom rail may not move downward until the brake is released.
  • the mechanisms utilizing a ratchet/pawl arrangement are set such that the brake permits the cord spools to wind the lift cords thereabout to bias the bottom rail toward the head rail, but prohibits the lift cords from unwinding from the cord spools to prevent the bottom rail from moving away from the head rail.
  • the combined weight of the bottom rail (Rw) and the weight of the accumulated window covering (WCw) is greater than the spring force of the spring motor (SMf) and the system friction (Ffd) opposing downward movement of the bottom rail. This can be expressed as (Rw + WCw) > (SMf + Ffd). Given this distribution of forces, the spring motor does not exert sufficient force to bias the bottom rail toward the head rail without additional force.
  • the spring force of the spring motor is sufficient to wind the lift cords about the cord spools.
  • the force required by the user (Of) to raise the bottom rail such that the spring motor force will wind the lift cords must be greater than the difference between the Spring Motor force (SMf) and the combined weights of the bottom rail (Rw) and accumulated window covering (WCw) and the system friction (Ff) opposing upward movement of the bottom rail: Of > [(SMf) - (Rw + WCw + Ffu)].
  • the release lever or actuating button for the downward one-way brake may be designed such that the lever or actuating button are being pushed downward. This would correspond with a users intuitive sense that to move the blind downward the lever or button should be pushed downward. Accordingly, the button could be located on a top surface of the bottom rail, such that release of the downward one-way brake would be accomplished by pressing the button downwards. Similarly, the lever could be designed such that the bottom one-way brake can be released by movement of the lever in a downward direction. For example referring to Figs. 6 and 7, the entire mechanism could be inverted such that downward movement of the lever would release the pawl from the ratchet.
  • a window covering is a set size
  • the spring force, system frictional forces, and may be designed into the window blind, to ensure that the one-way brake mechanism will operate over the entire operation of the blind. That is when the blind is fully extended, fully retracted and any position in between.
  • many window sizes are not standard, and are sized at the point of purchase or on an individual basis by a manufacturer. Once, the window covering has been sized to a customer's specification to fit the geometry of a given window the weight of the bottom rail and window covering is set.
  • the system will have to be balanced such that the equations outlined above for the various systems will be appropriate.
  • the factors that can be varied once the window covering size is set, is the spring motor force, the system friction (utilizing a variable friction mechanism), the brake friction (if utilizing the one-way friction brake embodiments), and the weight of the bottom rail, by adding additional weight to or removing weight from the bottom rail.
  • the spring force can be varied by utilizing a spring motor having a greater or lesser spring force as required, or by adding or removing spring motor modules to achieve the required spring force. Any one of these forces can be varied to enable the manufacturer to set the force equations such that the one-way brake mechanism will operate at all positions of the bottom rail relative to the head rail.
  • the spring force may be constant for all positions of the bottom rail relative to the head rail or the spring force may vary as a function of the position of the bottom rail relative to he head rail. It is recognized that it is possible to design a system in which the spring force, system frictional forces vary as the bottom rail is moved from a fully lowered position in which the bottom rail is furthest from the head rail to a fully raised position in which the bottom rail is closest to the head rail, this may be desirable since the weight of the window covering that accumulates on the bottom rail as the bottom rail moves toward the head rail increases.
  • the force equations outlined above need to be achieved for all positions of the bottom rail relative to the head rail. Where it is contemplated that the bottom rail will never be fully raised or fully lowered, the force equations outlined above, need not be achieved for these positions of the bottom rail.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Braking Arrangements (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Transmitters (AREA)

Claims (48)

  1. Jalousie pour fenêtre (10) comprenant :
    un rail supérieur (14) ;
    un rail inférieur (12) ;
    un habillage de fenêtre (16) s'étendant entre et relié de manière fonctionnelle au rail supérieur et au rail inférieur ;
    au moins un cordon de tirage (18 ; 19) s'étendant entre le rail inférieur et le rail supérieur ;
    un moteur à ressort (20) couplé de manière fonctionnelle au cordon de tirage, pour pousser le rail inférieur vers le rail supérieur ; caractérisée par
    un frein unidirectionnel (34 ; 60 ; 80 ; 90 ; 104) empêchant le rail inférieur de se déplacer vers le rail supérieur mais permettant au rail inférieur d'être éloigné du rail supérieur par un opérateur.
  2. Appareil selon la revendication 1, dans lequel il y a au moins une paire de cordons de tirage (18 ; 19).
  3. Appareil selon la revendication 2, dans lequel le moteur à ressort (20 ; 66) se trouve dans le rail inférieur et comprend un ressort (24) relié de manière fonctionnelle à une bobine de cordon (22 ;64 ; 83).
  4. Appareil selon la revendication 3, dans lequel le frein unidirectionnel se trouve dans le rail inférieur.
  5. Appareil selon la revendication 4, dans lequel le frein unidirectionnel (34 ; 60 ; 80 ; 90) comprend une roue à rochet (36 ; 62 ; 82) reliée de manière fonctionnelle à la bobine de cordon (22 ;64 ; 83).
  6. Appareil selon la revendication 5, dans lequel la roue à rochet (36) est reliée à une roue dentée auxiliaire (38) reliée de manière fonctionnelle à la bobine de cordon.
  7. Appareil selon la revendication 6, dans lequel la roue à rochet se trouve dans un moyeu de la roue dentée auxiliaire.
  8. Appareil selon la revendication 7, dans lequel le frein unidirectionnel comprend un mécanisme d'engagement à cliquet (48 ; 68 ; 84) comprenant un bouton (44 ; 72 ; 86) s'étendant à travers une ouverture (46) dans le rail inférieur (12).
  9. Appareil selon la revendication 8, dans lequel le bouton est pressé vers le haut pour libérer le cliquet de la roue à rochet.
  10. Appareil selon la revendication 4, dans lequel le frein unidirectionnel comprend un élément de frottement (90) appliqué au cordon.
  11. Appareil selon la revendication 10, dans lequel le frein unidirectionnel comprend un rouleau de frottement (92 ; 94) appliqué de manière fonctionnelle au moteur à ressort.
  12. Appareil selon la revendication 1, dans lequel le ressort a une force de ressort prédéterminée, le rail inférieur ayant un poids prédéterminé, et l'habillage de fenêtre ayant un poids prédéterminé, la force de ressort étant supérieure aux poids combinés du rail inférieur et de l'habillage de fenêtre.
  13. Appareil selon la revendication 1, dans lequel l'habillage de fenêtre comprend un élément parmi une pluralité de lamelles, un store cellulaire, un store plié, un store à contrôle de lumière et un store romain.
  14. Appareil selon la revendication 11, dans lequel l'élément de frottement à rochet (90) comprend un levier (102) relié de manière fonctionnelle à celui-ci, dans lequel un mouvement du levier vers le haut effectué par un utilisateur libère l'élément de frottement du moteur à ressort.
  15. Jalousie pour fenêtre (10) comprenant :
    un rail supérieur (14) ;
    un rail inférieur (12) ;
    un habillage de fenêtre (16) s'étendant entre et relié de manière fonctionnelle au rail supérieur et au rail inférieur ;
    au moins un cordon de tirage (18 ; 19) s'étendant entre le rail inférieur et le rail supérieur ;
    un moteur à ressort (20 ; 66) couplé de manière fonctionnelle au cordon de tirage appliquant une force vers le haut sur le rail inférieur en direction du rail supérieur ; caractérisé par
    un frein unidirectionnel (34 ; 60 ; 80 ; 90 ; 104) ayant une position engagée empêchant le moteur à ressort de déplacer le rail inférieur dans une première direction par rapport au rail supérieur et permettant au rail inférieur d'être déplacé dans une direction opposée à la première direction par rapport au rail supérieur ;
    un commutateur (48 ; 68 ; 84) situé dans le rail inférieur et relié de manière fonctionnelle au frein unidirectionnel pour désengager le frein unidirectionnel afin de permettre le déplacement du rail inférieur dans la première direction.
  16. Jalousie pour fenêtre selon la revendication 15, dans laquelle le commutateur comporte une partie de fonctionnement pouvant être déplacée par un opérateur dans la première direction pour désengager le frein unidirectionnel.
  17. Jalousie pour fenêtre selon la revendication 16, dans laquelle la première direction est vers le rail supérieur.
  18. Jalousie pour fenêtre selon la revendication 16, dans laquelle la première direction s'éloigne du rail supérieur.
  19. Jalousie pour fenêtre selon la revendication 15, dans lequel le frein unidirectionnel comprend un mécanisme à rochet et à cliquet.
  20. Jalousie pour fenêtre selon la revendication 19, dans laquelle le mécanisme à rochet et à cliquet est relié de manière fonctionnelle au moteur à ressort.
  21. Jalousie pour fenêtre selon la revendication 17, dans laquelle le frein unidirectionnel comprend un mécanisme à rochet et à cliquet.
  22. Jalousie pour fenêtre selon la revendication 15, dans laquelle le frein unidirectionnel comprend un moyen (90) destiné à appliquer un frottement au cordon de tirage.
  23. Jalousie pour fenêtre selon la revendication 22, dans laquelle le moyen destiné à appliquer un frottement au cordon de tirage comprend une paire de rouleaux (92 ; 94) poussés l'un vers l'autre et recevant une partie du cordon de tirage (18) entre eux.
  24. Jalousie pour fenêtre selon la revendication 22, dans laquelle le moyen destiné à appliquer un frottement au cordon de tirage comprend un élément poussé contre un second élément relié de manière fonctionnelle au moteur de ressort.
  25. Jalousie pour fenêtre (10) comprenant :
    un rail supérieur (14);
    un rail inférieur (12) ;
    un habillage de fenêtre (16) s'étendant entre et relié de manière fonctionnelle au rail supérieur et au rail inférieur ;
    au moins un cordon de tirage (18 ; 19) s'étendant entre le rail inférieur et le rail supérieur ;
    un moteur à ressort (20 ; 66) couplé de manière fonctionnelle au cordon de tirage appliquant une force vers le haut sur le rail inférieur en direction du rail supérieur ; caractérisé par
    un frein unidirectionnel (34 ; 60 ; 80 ; 90 ; 104) empêchant le rail inférieur de s'éloigner du rail supérieur mais permettant au rail inférieur d'être déplacé vers le rail supérieur par un opérateur.
  26. Appareil selon la revendication 25, dans lequel il y a deux cordons de tirage (18 ; 19).
  27. Appareil selon la revendication 25, dans lequel le moteur à ressort (20 ; 66) se trouve dans le rail inférieur et comprend un ressort (24) relié de manière fonctionnelle à une bobine de cordon.
  28. Appareil selon la revendication 27, dans lequel le frein unidirectionnel se trouve dans le rail inférieur.
  29. Appareil selon la revendication 28, dans lequel le frein unidirectionnel (34 ; 60 ; 80 ; 90) comprend une roue à rochet (36 ; 62 ; 82) reliée de manière fonctionnelle à la bobine de cordon (22 ; 64 ; 83).
  30. Appareil selon la revendication 29, dans lequel la roue à rochet (36) est reliée à une roue dentée auxiliaire (38) reliée de manière fonctionnelle à la bobine de cordon.
  31. Appareil selon la revendication 30, dans lequel la roue à rochet se trouve dans un moyeu de la roue dentée auxiliaire.
  32. Appareil selon la revendication 25, dans lequel le frein unidirectionnel comprend un mécanisme d'engagement à cliquet (48 ; 68 ; 84) comprenant un bouton (44 ; 72 ; 86) s'étendant à travers une ouverture (46) dans le rail inférieur (12).
  33. Appareil selon la revendication 32, dans lequel le bouton est pressé vers le bas pour libérer le cliquet de la roue à rochet.
  34. Appareil selon la revendication 25, dans lequel le frein unidirectionnel comprend un élément de frottement (90) appliqué au cordon.
  35. Appareil selon la revendication 34, dans lequel le frein unidirectionnel comprend un rouleau de frottement (92 ; 94) appliqué de manière fonctionnelle au moteur à ressort.
  36. Appareil selon la revendication 25, dans lequel le ressort a une force de ressort prédéterminée, le rail inférieur ayant un poids prédéterminé, et l'habillage de fenêtre ayant un poids prédéterminé, la force de ressort étant inférieure aux poids combinés du rail inférieur et de l'habillage de fenêtre.
  37. Appareil selon la revendication 25, dans lequel l'habillage de fenêtre comprend un élément parmi une pluralité de lamelles, un store cellulaire, un store plissé, un store à contrôle de lumière et un store romain.
  38. Appareil selon la revendication 34, dans lequel l'élément de frottement (90) comprend un levier (102) s'étendant depuis celui-ci, dans lequel un déplacement du levier vers le bas effectué par un utilisateur libère l'élément de frottement du moteur à ressort.
  39. Jalousie pour fenêtre (10) comprenant :
    un rail supérieur (14) ;
    un rail inférieur (12) ;
    un matériau d'habillage de fenêtre (16) s'étendant entre le rail supérieur et le rail inférieur ;
    des premier (18) et second (19) cordons de tirage s'étendant entre le rail supérieur et le rail inférieur ;
    un élément de poussée (20 ; 66) configuré pour pousser le rail inférieur vers le rail supérieur, et couplé de manière fonctionnelle aux premier et second cordons de tirage ;
    un frein unidirectionnel (34 ; 60 ; 80 ; 90 ; 104) configuré pour se coupler, de manière à pouvoir se libérer, au premier cordon de tirage, dans lequel l'élément de poussée est configuré pour élever l'engagement absent de rail inférieur du frein avec le premier cordon de tirage, et dans lequel le frein unidirectionnel empêche le rail inférieur de se déplacer vers le rail supérieur sous une force de poussée de l'élément de poussée mais permet au rail inférieur d'être éloigné du rail supérieur par l'opérateur.
  40. Appareil selon la revendication 39, dans lequel le frein comprend un mécanisme de tension unidirectionnel (36 ; 62 ; 82) et une interface utilisateur (44 ; 72 ; 86), le mécanisme de tension unidirectionnel est configuré pour fournir une force de résistance lors du déplacement de l'un des premier et second cordons de tirage, et l'interface utilisateur est configurée pour déplacer le mécanisme de tension unidirectionnel entre un état arrêté et un état de roue libre.
  41. Appareil selon la revendication 40, dans lequel le mécanisme de tension unidirectionnel est poussé vers l'état arrêté.
  42. Appareil selon la revendication 41, dans lequel le mécanisme de tension unidirectionnel est poussé vers l'état arrêté par un ressort (24).
  43. Appareil selon la revendication 39, dans lequel l'élément de poussée se trouve à proximité du frein.
  44. Appareil selon la revendication 43, dans lequel l'élément de poussée se trouve dans le rail supérieur.
  45. Jalousie pour fenêtre (10) comprenant :
    un rail supérieur (14) ;
    un rail inférieur (12) ;
    un matériau d'habillage de fenêtre (16) s'étendant entre le rail supérieur et le rail inférieur ;
    des premier (18) et (19) second cordons de tirage s'étendant entre le rail supérieur et le rail inférieur ;
    un élément de poussée (20 ; 66) configuré pour pousser le rail inférieur vers le rail supérieur, et couplé de manière fonctionnelle aux premier et second cordons de tirage ;
    un frein (34 ; 60 ; 80 ; 90 ; 104) comprenant un mécanisme de tension unidirectionnel (36 ; 62 ; 82) et une interface utilisateur (44 ; 72 ; 86), le mécanisme de tension unidirectionnel engageant l'un des premier et second cordons de tirage et étant configuré pour fournir une force de résistance lors du déplacement du cordon de tirage dans une direction, et l'interface utilisateur étant configuré pour déplacer le mécanisme de tension unidirectionnel entre un état arrêté et un état de roue libre ;
    dans lequel l'élément de poussée est configuré pour élever l'engagement absent de rail inférieur du frein avec le premier cordon de tirage.
  46. Appareil selon la revendication 45, dans lequel le mécanisme de tension unidirectionnel est poussé vers l'état arrêté.
  47. Appareil selon la revendication 46, dans lequel le mécanisme de tension unidirectionnel est poussé vers l'état arrêté par un ressort.
  48. Appareil selon la revendication 47, dans lequel l'élément de poussée se trouve à proximité du frein.
EP02000180A 2001-01-09 2002-01-09 Frain pour une jalousie sans corde Expired - Lifetime EP1223296B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/756,942 US6644375B2 (en) 2001-01-09 2001-01-09 Cordless blind brake
US756942 2001-01-09

Publications (2)

Publication Number Publication Date
EP1223296A1 EP1223296A1 (fr) 2002-07-17
EP1223296B1 true EP1223296B1 (fr) 2007-08-29

Family

ID=25045705

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02000180A Expired - Lifetime EP1223296B1 (fr) 2001-01-09 2002-01-09 Frain pour une jalousie sans corde

Country Status (7)

Country Link
US (1) US6644375B2 (fr)
EP (1) EP1223296B1 (fr)
CN (1) CN1366124A (fr)
AT (1) ATE371799T1 (fr)
DE (1) DE60222032T2 (fr)
HK (1) HK1048152B (fr)
MX (1) MXPA02000231A (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9510711B2 (en) 2012-10-11 2016-12-06 Roman Tsibulevskiy Partition technologies

Also Published As

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MXPA02000231A (es) 2004-05-21
HK1048152B (zh) 2008-04-11
DE60222032D1 (de) 2007-10-11
ATE371799T1 (de) 2007-09-15
DE60222032T2 (de) 2008-01-10
US20020088562A1 (en) 2002-07-11
US6644375B2 (en) 2003-11-11
CN1366124A (zh) 2002-08-28
EP1223296A1 (fr) 2002-07-17
HK1048152A1 (en) 2003-03-21

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